scholarly journals Three-Dimensional Reconstruction Algorithm of Computed Tomography Imaging for Surgical Treatment and Rapid Rehabilitation Nursing of Renal Cell Carcinoma

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Lijun Wang ◽  
Haiyan Lin ◽  
Hong Zheng ◽  
Yuying Jiang
Keyword(s):  
Computed Tomography ◽  
3D Reconstruction ◽  
Renal Cell ◽  
Three Dimensional ◽  
Life Quality ◽  
Reconstruction Algorithm ◽  
Nursing Intervention ◽  
Ct Images ◽  
3D Ct ◽  
Self Rating

This study was carried out to explore the promotion role of computed tomography (CT) imaging three-dimensional (3D) reconstruction technology and rapid rehabilitation nursing intervention (RRNI) in the treatment of patients with renal cell cancer (RCC) laparoscopic radical nephrectomy (LRN) in view of the patient’s condition. 98 RCC patients who were admitted to the hospital from July 2019 to July 2020 were selected as the research subjects, and all patients underwent the LRN and the RRIN. Of which, 46 RCC patients were scanned with CT images (regarded as the CT group), and 46 RCC patients were scanned with CT images based on 3D reconstruction algorithms (regarded as the 3D CT group). The clinical efficacy and the life quality, pain degree, and adverse mood changes before and after the RRN were analyzed and compared. The results showed that the surgery time in the 3D CT group and the CT group was 130.2 ± 42.8 minutes and 162.4 ± 38.5 minutes, respectively ( P < 0.05 ). The recurrence rate of RCC in both groups was 0%. The estimated blood loss in the 3D CT group and the CT group was 93.6 ± 35.5 mL and 90.3 ± 40.2 mL, respectively; the complication rate in the 3D CT and CT group was 5% and 12%, respectively; the hospital stay in the 3D CT and CT group was 12.5 ± 4.7 days and 12.1 ± 3.2 days, respectively, which had no statistical significance ( P > 0.05 ). The scores of visual analogue scale (VAS), 36-Item Short-Form Health Survey (SF-36), self-rating depression scale (SDS), and self-rating anxiety scale (SAS) of patients in the two groups were statistically significant ( P < 0.05 ). It indicated that CT images based on the 3D reconstruction algorithm could be applied in LRN of RCC patients to shorten the surgery time and improve the surgical effect, and implementation of the RRN could relieve the adverse mood of RCC patients and effectively improve their life quality.

scholarly journals Computed Tomography Image under Three-Dimensional Reconstruction Algorithm Based in Diagnosis of Renal Tumors and Retroperitoneal Laparoscopic Partial Nephrectomy

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Haijie Zhang ◽  
Fu Yin ◽  
Liyang Yang ◽  
Anqi Qi ◽  
Weiwei Cui ◽  
...  
Keyword(s):  
Computed Tomography ◽  
3D Reconstruction ◽  
Partial Nephrectomy ◽  
Three Dimensional ◽  
Reconstruction Algorithm ◽  
Ct Images ◽  
Renal Tumors ◽  
Dimensional Reconstruction ◽  
Group A ◽  
Group B

This study was to explore the clinical application value of computed tomography (CT) images based on a three-dimensional (3D) reconstruction algorithm for laparoscopic partial nephrectomy (LPN) in patients with renal tumors. 30 cases of renal cell carcinoma (RCC) patients admitted to the hospital were selected as the research objects and were rolled into two groups using a random table method. The patients who received PLN under the three-dimensional reconstruction and laparoscopic technique were included in the experimental group (group A), and the patients who received LPN using CT images only were included in the control group (group B). In addition, the treatment results of the two groups of patients were compared and analyzed. Results. The effective rate of the established model was 93.3%; the total renal arteriovenous variability of group A (13.3%) was higher than that of group B (6.7%), and the operation time (131.5 ± 32.1 minutes) was much lower than that of group B (158.7 ± 36.2 minutes), showing statistical significance ( P  < 0.05). Conclusion. CT images based on 3D reconstruction algorithms had high clinical application value for LPN in patients with renal tumors, which could improve the efficiency and safety of LPN.

scholarly journals Standardised 3D-CT Lung Volumes for Patients with Idiopathic Pulmonary Fibrosis

2021 ◽  
Author(s):  
Yuko Tanaka ◽  
Yuzo Suzuki ◽  
Hirotsugu Hasegawa ◽  
Koshi Yokomura ◽  
Atsuki Fukada ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Idiopathic Pulmonary Fibrosis ◽  
Pulmonary Fibrosis ◽  
Pulmonary Function Tests ◽  
Three Dimensional ◽  
Ct Images ◽  
3D Ct ◽  
Pulmonary Physiology ◽  
Lung Physiology ◽  
Lower Lung

Abstract Background: The assessment of lung physiology via pulmonary function tests (PFTs) is essential for patients with idiopathic pulmonary fibrosis (IPF). However, PFTs require active participation, which can be challenging for patients with severe respiratory failure, such as during acute exacerbations (AE) of IPF. Recently advances enabled to re-construct of 3-dimensional computed-tomography (3D-CT) images. Methods: This is a retrospective multi-center cohort study. This study established a standardisation method and quantitative analysis of lung volume (LV) based on anthropometry using three-dimensional computed tomography (3D-CT) images. The standardised 3D-CT LV in patients with IPF at diagnosis (n=140) and during AE (cohort1; n=61 and cohort2; n=50) and those of controls (n=53) were measured. Results: The standardised 3D-CT LVs at IPF diagnosis were less than those of control patients, especially in the lower lung lobes. The standardised 3D-CT LVs were correlated with forced vital capacity (FVC) and validated using the modified Gender-Age-Physiology (GAP) index. The standardised 3D-CT LVs at IPF diagnosis were independently associated with prognosis. During AE, PFTs were difficult to perform, 3D-CT analyses revealed reduced lung capacity in both the upper and lower lobes compared to those obtained at diagnosis. Lower standardised 3D-CT LVs during AE were independently associated with worse outcomes in independent two cohorts. Particularly, volume loss in the upper lobe at AE had prognostic values.Conclusion: A novel image quantification method for assessing pulmonary physiology using standardised 3D-CT-derived LVs was developed. This method successfully predicts mortality in patients with IPF and AE of IPF, and may be a useful alternative to PFTs when PFTs cannot be performed.

Motion Analysis of the Trapeziometacarpal Joint Using Three-dimensional Computed Tomography

2016 ◽  
Vol 21 (01) ◽  
pp. 78-84 ◽  
Author(s):  
Tetsuya Kimura ◽  
Hiroaki Takai ◽  
Tatsuo Azuma ◽  
Koichi Sairyo
Keyword(s):  
Computed Tomography ◽  
Range Of Motion ◽  
Three Dimensional ◽  
Ct Images ◽  
Metacarpal Bone ◽  
Joint Surface ◽  
3D Ct ◽  
Trapeziometacarpal Joint ◽  
Wide Range ◽  
Contact Surfaces

Background: Zancolli theorized that the first metacarpal bone axially rotates on the semispheroidal part of the trapezium, which is controlled by ligaments. This study used three-dimensional computed tomography (3D-CT) to describe the motion of the first metacarpal bone on the trapezium. Methods: 3D-CT images were taken of the left hand of 30 healthy volunteers (mean age [Formula: see text] years, 15 men and 15 women). They were divided into five groups: radial abduction, retroposition, adduction, palmar abduction, and opposition. The range of motion of radial abduction and palmar abduction of the trapeziometacarpal joint was measured from the first metacarpal bone to the second metacarpal bone. The range of motion of pronation was measured following Cheema's method. The main contacts of the joint surface of trapezium and the first metacarpal bone were determined on the 3D-CT images. Results: Pronation of the trapeziometacarpal joint was [Formula: see text] in radial abduction, [Formula: see text] in retroposition, [Formula: see text] in adduction, [Formula: see text] in palmar abduction, and [Formula: see text] in opposition. Radial abduction was [Formula: see text] in radial abduction, [Formula: see text] in retroposition, [Formula: see text] in adduction, [Formula: see text] in palmar abduction, and [Formula: see text] in opposition. Palmar abduction was [Formula: see text] in radial abduction, [Formula: see text] in retroposition, [Formula: see text] in adduction, [Formula: see text] in palmar abduction, and [Formula: see text] in opposition. The contact surfaces of the trapezium and the first metacarpal bone were dorsal and ulnar in radial abduction, radial and ulnar in retroposition, and volar-ulnar and volarradial in opposition, respectively, while they were both central in adduction and both radial in palmar abduction. Conclusions: The range of motion of the trapeziometacarpal joint was 44° for radial abduction/adduction, 48° for palmar abduction/adduction, and 57° for pronation/supination. The varying contact surfaces of the trapezium and the first metacarpal bone enabled a wide range of motion.

Comparison between Three-Dimensional and Triplanar Computed Tomography Imaging of the Frontal Recess

2009 ◽  
Vol 23 (5) ◽  
pp. 502-505 ◽  
Author(s):  
Seth J. Isaacs ◽  
Parul Goyal
Keyword(s):  
Computed Tomography ◽  
Frontal Sinus ◽  
Three Dimensional ◽  
Surgical Techniques ◽  
Ct Images ◽  
Outflow Tract ◽  
Sinus Surgery ◽  
3D Ct ◽  
Sinus Disease ◽  
Frontal Recess

Background Despite advances in endoscopic surgical techniques, management of frontal sinus disease remains challenging. Much of this is related to the complex nature of frontal recess anatomy. A thorough understanding of frontal recess anatomy is paramount for the safety and success of frontal sinus surgery. Three-dimensional (3D) computed tomography (CT) may allow surgeons to obtain a more complete preoperative assessment of frontal recess anatomy. The purpose of this study was to determine if reconstructed 3D CT images as an adjunct to conventional triplanar imaging provide additional information regarding the frontal recess anatomy. Methods A prospective study was performed. Two otolaryngologists reviewed the CT scans of 25 patients referred for routine paranasal sinus disease. The findings from review of the triplanar CT images were compared with the findings from review of the 3D reconstructions. Each study was assessed for (1) frontoethmoidal cells, (2) agger nasi cell, (3) subrabullar and frontal bullar cells, (4) intersinus septal cell, (5) superior uncinate process attachment site, and (6) and frontal sinus outflow tract. The examiners rated the usefulness of each study to identify each of the aforementioned anatomic subsites using a modified 5-point Likert scale. Results Intersinus septal cells, supraorbital ethmoid cells, and the anterior–posterior dimension of the frontal sinus outflow tract were better defined on the reconstructed 3D CT images. Conclusion Three-dimensional CT is a useful adjunct to the conventional triplanar studies for the evaluation of frontal sinus and recess anatomy. This technique can define certain anatomic variants more effectively than 2D multiplanar reconstructed images.

scholarly journals Visualization of torn anterior cruciate ligament using 3-dimensional computed tomography

2013 ◽  
Vol 5 (3) ◽  
pp. 22 ◽  
Author(s):  
Hiroaki Uozumi ◽  
Toshimi Aizawa ◽  
Takehiko Sugita ◽  
Tomonori Kunii ◽  
Shun Abe ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Anterior Cruciate Ligament ◽  
Acl Reconstruction ◽  
Cruciate Ligament ◽  
Three Dimensional ◽  
Lateral Wall ◽  
Ct Images ◽  
Reconstruction Technique ◽  
3D Ct ◽  
Anterior Cruciate

Recently, a remnant-preserving anterior cruciate ligament (ACL) reconstruction technique has been developed. However, the pre-operative condition of remnant ACL is occasionally difficult to evaluate by magnetic resonance imaging. The purpose of this study is to evaluate the accuracy of pre-operative visualization of remnant ACL using three-dimensional computed tomography (3D-CT). The remnant ACL in 25 patients was examined by 3D-CT before ACL reconstruction surgery. Findings on 3D-CT images and arthroscopy were compared. The 3D-CT images were classified into 4 groups: Group A, remnant fibers attached to the posterior cruciate ligament (PCL); Group B, those located between the PCL and the lateral wall; Group C, those attached to the lateral wall; and Group D, no identifiable remnant fibers on the tibial side. These groups were made up of 4, 3, 9 and 9 patients, respectively. Findings on 3D-CT images were identical to those during arthroscopy in 20 of 25 cases (80%). Remnant ACL can be accurately evaluated using 3D-CT in 80% of cases of torn ACL. This novel method is a useful technique for pre-operative assessment of remnant ACL.

scholarly journals Lobectomy for lung cancer with a displaced left B1 + 2 and an anomalous pulmonary vein: a case report

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Shinichi Sakamoto ◽  
Hiromitsu Takizawa ◽  
Naoya Kawakita ◽  
Akira Tangoku
Keyword(s):  
Computed Tomography ◽  
Lung Cancer ◽  
Pulmonary Vein ◽  
Three Dimensional ◽  
Lower Lobe ◽  
Rare Condition ◽  
3D Ct ◽  
Anatomical Structures ◽  
Case Presentation ◽  
Anomalous Pulmonary Vein

Abstract Background A displaced left B1 + 2 accompanied by an anomalous pulmonary vein is a rare condition involving complex structures. There is a risk of unexpected injuries to bronchi and blood vessels when patients with such anomalies undergo surgery for lung cancer. Case presentation A 59-year-old male with suspected lung cancer in the left lower lobe was scheduled to undergo surgery. Chest computed tomography revealed a displaced B1 + 2 and hyperlobulation between S1 + 2 and S3, while the interlobar fissure between S1 + 2 and S6 was completely fused. Three-dimensional computed tomography (3D-CT) revealed an anomalous V1 + 2 joining the left inferior pulmonary vein and a branch of the V1 + 2 running between S1 + 2 and S6. We performed left lower lobectomy via video-assisted thoracic surgery, while taking care with the abovementioned anatomical structures. The strategy employed in this operation was to preserve V1 + 2 and confirm the locations of B1 + 2 and B6 when dividing the fissure. Conclusion The aim of the surgical procedure performed in this case was to divide the fissure between S1 + 2 and the inferior lobe to reduce the risk of an unexpected bronchial injury. 3D-CT helps surgeons to understand the stereoscopic positional relationships among anatomical structures.

Three-Dimensional Reconstruction and Numerical Simulation of Intracranial Aneurysm for Sectional Anatomy Based on Computed Tomography Angiography

2021 ◽  
Vol 11 (7) ◽  
pp. 1957-1962
Author(s):  
Xuefei Deng ◽  
Yu Liu ◽  
Qingling Meng ◽  
Danning Cao ◽  
Quan Bao ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Numerical Simulation ◽  
Intracranial Aneurysm ◽  
3D Reconstruction ◽  
Intracranial Aneurysms ◽  
Three Dimensional ◽  
Control Group ◽  
Observation Group ◽  
Intracranial Artery ◽  
Sectional Anatomy

Objective: The mortality of rebleeding after ruptured intracranial aneurysms was more than 40%. It is essential to identify the intracranial artery in sectional anatomy. However, it is difficult for students to understand the intracranial artery in the section. Therefore, the purpose of this study is to explore the application effect of three-dimensional (3D) reconstruction and numerical simulation of intracranial aneurysm for sectional anatomy based on computed tomography angiography (CTA). Method: Sixty students in medical imaging specialty of our university were divided into two groups. The control group was taught with conventional sectional anatomy and CT images, while the observation group was taught with 3D reconstruction and numerical simulation of intracranial aneurysm. The teaching characteristics and teaching effects were analyzed and compared between the two groups. Result: The 3D reconstruction can accurately express the size, direction, and adjacent relationship of aneurysms. Through rotation of the 3D image, students can easily understand the name and location of cerebral arteries. Combined with the function of 3D positioning, each blood vessel can automatically and accurately locate in the transverse, coronal, and sagittal plane. Abnormal wall shear stress was easily found in the intersection of cerebral artery circle, which was the physiological basis for the occurrence of aneurysms. There was a high shear zone in the root of an aneurysm, which was the physiological factor of rupture. The scores of sectional specimen identification, drawing examination, and theoretical assessment in the observation group were significantly higher than those in the control group (P < 0.05). Conclusion: The 3D reconstruction and numerical simulation can directly display the 3D morphological and physiological characteristics of intracranial aneurysms, which is convenient for students to understand and memorize. It can reach a good teaching effect in sectional anatomy.

scholarly journals Prognosis of pulmonary fibrosis presenting with a usual interstitial pneumonia pattern on computed tomography in patients with myeloperoxidase anti-neutrophil cytoplasmic antibody-related nephritis: a retrospective single-center study

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Toshikazu Watanabe ◽  
Tomoyuki Minezawa ◽  
Midori Hasegawa ◽  
Yasuhiro Goto ◽  
Takuya Okamura ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Pulmonary Fibrosis ◽  
Interstitial Pneumonia ◽  
Lung Volume ◽  
Lung Fibrosis ◽  
Usual Interstitial Pneumonia ◽  
Three Dimensional ◽  
3D Ct ◽  
Antifibrotic Therapy ◽  
Significant Difference

Abstract Background Myeloperoxidase anti-neutrophil cytoplasmic antibody-related nephritis (MPO-ANCA nephritis) is occasionally accompanied by lung abnormalities such as pulmonary fibrosis. However, the clinical features of pulmonary fibrosis in patients with MPO-ANCA nephritis have not been well documented. This study was performed to compare the prognosis of a usual interstitial pneumonia (UIP) pattern of lung fibrosis in patients with MPO-ANCA nephritis with the prognosis of idiopathic pulmonary fibrosis (IPF). Methods We retrospectively reviewed the medical records of 126 patients with MPO-ANCA nephritis and identified 31 with a UIP pattern of lung fibrosis on high-resolution or thin-slice computed tomography (CT). We compared the characteristics and prognosis of these patients with those of 32 patients with IPF. In 18 patients from both groups, we assessed and compared the decline in lung volume over time using three-dimensional (3D) CT images reconstructed from thin-section CT data. Results The numbers of male and female patients were nearly equal among patients with MPO-ANCA nephritis exhibiting a UIP pattern; in contrast, significant male dominancy was observed among patients with IPF (p = 0.0021). Significantly fewer smokers were present among the patients with MPO-ANCA nephritis with a UIP pattern than among those with IPF (p = 0.0062). There was no significant difference in the median survival time between patients with MPO-ANCA nephritis with a UIP pattern (50.8 months) and IPF (55.8 months; p = 0.65). All patients with IPF in this cohort received antifibrotic therapy (pirfenidone or nintedanib). Almost half of the deaths that occurred in patients with MPO-ANCA nephritis with a UIP pattern were caused by non-respiratory-related events, whereas most deaths in patients with IPF were caused by respiratory failure such as acute exacerbation. In the 3D CT lung volume analyses, the rate of decline in lung volume was equivalent in both groups. Conclusions MPO-ANCA nephritis with a UIP pattern on CT may have an unfavorable prognosis equivalent to that of IPF with a UIP pattern treated with antifibrotic agents.

scholarly journals Cone Beam Computed Tomography 3D Reconstruction of the Mandibular Condyle

2008 ◽  
Vol 78 (5) ◽  
pp. 880-888 ◽  
Author(s):  
Brian Schlueter ◽  
Ki Beom Kim ◽  
Donald Oliver ◽  
Gus Sortiropoulos
Keyword(s):  
Computed Tomography ◽  
Soft Tissue ◽  
3D Reconstruction ◽  
Cone Beam Computed Tomography ◽  
Three Dimensional ◽  
Mandibular Condyle ◽  
Cone Beam ◽  
Low Density ◽  
Mineral Density ◽  
Linear Measurements

Abstract Objective: To determine the ideal window level and width needed for cone beam computed three-dimensional (3D) reconstruction of the condyle. Materials and Methods: Linear dimensions were measured with a digital caliper to assess the anatomic truth for 50 dry human mandibular condyles. Condyles were scanned with the i-CAT cone beam computed tomography (CBCT) and 3D-models were reconstructed. Three linear three-dimensional measurements were made on each of the 50 condyles at 8 different Hounsfield unit (HU) windows. These measurements were compared with the anatomic truth. Volumetric measurements were also completed on all 50 condyles, at 23 different window levels, to define the volumetric distribution of bone mineral density (BMD) within the condyle. Results: Significant differences were found in two of the three linear measurement groups at and below the recommended viewing window for osseous structures. The most accurate measurements were made within the soft tissue range for HU window levels. Volumetric distribution measurements revealed that the condyles were mostly comprised of low-density bone, and that condyles exhibiting significant changes in linear measurements were shown to have higher percentages of low-density bone than those condyles with little change from the anatomic truth. Conclusions: CBCT assessment of the mandibular condyle, using the 3D reconstruction, is most accurate when accomplished at density levels below that recommended for osseous examination. However, utilizing lower window levels which extend into the soft tissue range, may compromise one's capacity to view the bony topography.

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